Ripstop Nylon Tarp by EMS. This 8.5 x 10 three-piece ripstop tarp has been has five 1″ wide nylon loops per side. Not sure if the loops are original to the tarp or a later addition for making a specific shelter.
The blue label was the original used by EMS in the late 60s when the company started, I’d estimate this tarp is from right around 1970. Also seen here are a smaller EMS stuff sack as well as the Alpine stuff sack.